<!DOCTYPE html>
<html lang="en" >

<head>
    <meta charset="UTF-8">
    <title>文明单位后台登录</title>

    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/meyer-reset/2.0/reset.min.css">

    <link rel='stylesheet' href='https://fonts.googleapis.com/css?family=Roboto:400,100,300,500,700,900'>
    <link rel='stylesheet' href='https://fonts.googleapis.com/css?family=Montserrat:400,700'>
    <link rel='stylesheet' href='https://maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css'>

    <link rel="stylesheet" href="../css/style.css">
    <script type="text/javascript" src="../jquery.min.js"></script>
    <script type="text/javascript" src="../js/login.js"></script>


    <style>

        .container .info h1{
            font-size:27px;
            color: #edf2fc;



        }
        .form .button1{

            width: 49%;
            cursor: pointer;
            background: #EF3B3A;
            color:white;
        }
        .form{
            max-width: 350px;
            filter:alpha(Opacity=80);-moz-opacity:0.9;opacity: 0.9;
        }
        .login-form #yanzheng{

            width: 245px;
        }
        .form .message {
            margin: 35px 0 0;

        }
        .login-form{
            margin-top:20px;
        }
        .div1{
            width:30%;
            height:50px;
            float: right;
        }
        body{
            background-size:cover;
            background-image: url(../img/hxjz.jpg);
            background-repeat: no-repeat;
            width:100%;
            height:auto;
        }

        body::before{
            background:none;
        }
    </style>

</head>

<body>


<div class="container">
    <div class="info">
        <h1>河南省文明单位在线管理系统</h1>
    </div>
</div>
<div class="form">

    <form class="login-form">
        <input type="text" id="account" placeholder="请输入账号"/>
        <input type="password" id="password" placeholder="请输入密码"/>

        <input type="text" class="input-val" id="yanzheng" placeholder="请输入验证码"/>
        <div class="div1">
            <canvas id="canvas" width="100px" height="30px"></canvas>
        </div><br>
        <input type="button" class="button1" onclick="toIndex()" value="注册"/>
        <input type="button" class="button1" onclick="login()" value="登录"/>
        <p class="message">Copyright © 2018-2019 All Rights Reserved. More Templates </p>
    </form>
</div>
<script>
    var show_num = [];
    $(function(){
        draw(show_num);
        $("#canvas").on('click',function(){
            draw(show_num);
        });
    });

    function draw(show_num) {
        var canvas_width=$('#canvas').width();
        var canvas_height=$('#canvas').height();
        var canvas = document.getElementById("canvas");//获取到canvas的对象，演员
        var context = canvas.getContext("2d");//获取到canvas画图的环境，演员表演的舞台
        canvas.width = canvas_width;
        canvas.height = canvas_height;
        var sCode = "A,B,C,E,F,G,H,J,K,L,M,N,P,Q,R,S,T,W,X,Y,Z,1,2,3,4,5,6,7,8,9,0";
        var aCode = sCode.split(",");
        var aLength = aCode.length;//获取到数组的长度

        for (var i = 0; i <= 3; i++) {
            var j = Math.floor(Math.random() * aLength);//获取到随机的索引值
            var deg = Math.random() * 30 * Math.PI / 180;//产生0~30之间的随机弧度
            var txt = aCode[j];//得到随机的一个内容
            show_num[i] = txt.toLowerCase();
            var x = 10 + i * 20;//文字在canvas上的x坐标
            var y = 20 + Math.random() * 8;//文字在canvas上的y坐标
            context.font = "bold 23px 微软雅黑";

            context.translate(x, y);
            context.rotate(deg);

            context.fillStyle = randomColor();
            context.fillText(txt, 0, 0);

            context.rotate(-deg);
            context.translate(-x, -y);
        }
        for (var i = 0; i <= 5; i++) { //验证码上显示线条
            context.strokeStyle = randomColor();
            context.beginPath();
            context.moveTo(Math.random() * canvas_width, Math.random() * canvas_height);
            context.lineTo(Math.random() * canvas_width, Math.random() * canvas_height);
            context.stroke();
        }
        for (var i = 0; i <= 30; i++) { //验证码上显示小点
            context.strokeStyle = randomColor();
            context.beginPath();
            var x = Math.random() * canvas_width;
            var y = Math.random() * canvas_height;
            context.moveTo(x, y);
            context.lineTo(x + 1, y + 1);
            context.stroke();
        }
    }

    function randomColor() {//得到随机的颜色值
        var r = Math.floor(Math.random() * 256);
        var g = Math.floor(Math.random() * 256);
        var b = Math.floor(Math.random() * 256);
        return "rgb(" + r + "," + g + "," + b + ")";
    }

    //注册，跳转到条款页面
    function toIndex(){

        window.location.href="/hns/regist";
    }


    function login(){

        var account=$("#account").val();
        //alert(account);
        var password=$("#password").val();
        //使用jquery ajax进行验证
        $.ajax({
            url:"/login/logi",//请求的路径
            data:{"username":account,"password":password},//向服务器传递的键值对
            type:"post",//使用的请求的方法
            success:function(data){
                //d代表的是后台servlet传递过来的数据
                if(data=="封存"){
                    alert("账号已被封存");
                    $("#password").empty();
                }else{
                    if(data==true){
                        var val = $(".input-val").val().toLowerCase();

                        var num = show_num.join("");

                        if(val==''){
                            alert('请输入验证码！');
                            $(".input-val").val('');
                            draw(show_num);
                            return false;
                        }else if(val == num){

                            $(".input-val").val('');
                            draw(show_num);
                        }else{
                            alert('验证码错误！请重新输入！');
                            $(".input-val").val('');
                            draw(show_num);
                            return false;
                        }
                        //登录成功,跳转到主页
                        //alert("登录成功");
                        window.location.href="/tree/denglu";
                    }else{
                        //跳转页面
                        alert("账号或密码错误");
                        $("#password").empty();
                    }
                }
            },
            error:function(data){
                alert("登录错误");
            }
        });
    }

</script>


</body>

</html>
